Finding the Fourth Proportional to 16,942.69, 23,380.97 and 9,389.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,942.69 : 23,380.97 = 9,389.15 : x
2. Step 2: Convert to fraction form
   16,942.69/23,380.97 = 9,389.15/x
3. Step 3: Cross multiply
   16,942.69x = 23,380.97 × 9,389.15
4. Step 4: Simplify right side
   16,942.69x = 219,527,411.12
5. Step 5: Solve for x
   x = 219,527,411.12/16,942.69
6. Step 6: Final answer
   x = 12,957.05